As check-in champion Foursquare prepares to make a run at making money, the startup's vice president of business development, Tristan Walker, has checked out. Walker, who holds an MBA from Stanford and was once an intern at Twitter, announced his resignation from Foursquare in a blog post this morning. Walker...
<A HREF="http://venturebeat.com/2012/05/02/foursquare-tristan-walker/">Read More</A>